JSON table explorer

This tool reads one JSON document (or one JSON value per line, or a GeoJSON feature collection), lists every array it contains, and turns the array you pick into a table. It does not edit your data, join arrays, query with JSONPath, or stream files bigger than the ceilings: 50 MB of text, 200,000 rows, 500 columns, 64 nesting levels, 50 items per indexed array, and 4,096 characters per cell. Object keys that contain a literal dot flatten ambiguously, because customer.first.name cannot be told apart from a customer object with a first.name field. Engine json-string-native, run plan main-thread: parsing, flattening, filtering, and export all stay in this tab and nothing is uploaded.